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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
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Compositions and methods for making rare earth films are described. The composition includes a barium (Ba) metal-organic compound, one or more rare earth metal organic compounds and a copper (Cu) metal-organic compound. The composition also includes a halogen. For example, the composition can include a halogenated organic solvent. The composition also includes a solvent having a boiling point greater than approximately C. The precursor solution can also include a low-viscosity solvent that does not react with the halogenated solvent to produce water. A high-viscosity compound can also be included to enable the formation of thicker films. The resulting precursor solution can be deposited on a substrate, pyrolyzed at a heating rate greater than C./minute, and crystallized to produce smooth, sheer films. Films greater than 100 nm in thickness can be produced with transport J.sub.c values of 4.times.10.sup.6 A/cm.sup.2 at K on various substrates.
Clem, Paul (Albuquerque, NM), Edney, Cynthia (Sandia Park, NM), Overmyer, Donald (Albuquerque, NM), Siegal, Michael (Albuquerque, NM), Dawley, Jeffrey (San Jose, CA), Backer, Michael (Koln, DE)
ZENERGY POWER INC. (South San Francisco CA), SANDIA CORPORATION (Albuquerque NM)
12/ 174,970
July 17, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0001] This invention was developed under Contract No. DE-AC04-94AL85000 between Sandia Corporation and the United States Department of Energy. The United States Government has certain rights in the invention. [0002] The section headings used herein are for organizational purposes only and should not be construed as limiting the subject matter described herein in any way.